Pipe valve



H. CAMPBELL PIPE VALVE July 26; 1927.

Filed June '1," 1923 2 Sheets-Sheet 1 July 26, 1927.

PIPE VALVE Filed June 1, 1925 mmwxxw 58 vH. CAMPBELL 2 Sheets-Sheet gPatented July 26, 1927. i 1,636,951

warren s'rA'rEs PATENT OFFICE.

HARRY CAMPBELL, E MARINERS HARBOR, NEW YORK, ASSIGNOR OE TWENTY-FIVEIPER CENT TO ROGER THOMPSON BUTTS, TWENTY PER CENT TO ERNEST WILSONBUTTS, AND TWENTY PER GENT TO ROBERT STARR ALLYN, ALL OF NEW YORK, N. Y.

PIPE VALVE.

Application filed June 1, 1923. Serial No. 642,853.

This invention is designed mainly for use usual air test valve (notshown). The presi in automatically operating water sprinkler sure of airor Water in the chamber 17 may systems for the extinguishing of fire andbe determined by opening a self closing test whereof, accompanying thispetition, are valve 22. 7

three drawings i. e. a vertical longitudinal The valve 16 is normallyheld closed by sectional drawing Fig. l; a sectional dra-W- its weightplus the pressure of air in the ing of the test valve Fig. 2; and asectional casing 1, the air pressure and weight being drawing Fig. 3 ofthe alarm valve and the sufficient to overcome the" pressure of Waterfollowing is a description. in the inlet 2. When the air pressure fails10 The invention covers a dry pipe valve of the Water pressure raisesthe valve 16. The

relatively simple and economic construction spring pressed latch 18carried by the cover wliieh will be compact, eflicient and easily plate7 engages the teeth 29 on the valve assemble-d providing for suchautomatically and holds the valve open. The counteroperating parts asare necessary. 7 weight 19 on the valve 16 near its hinge 36 15 Oneobject is to provide a construction havassists in the opening action ofthe valve.

ing a combined water and air valve With Thee-over plate 7 is held inplace by bolts means for automatically shutting off the air. 34 andhinged at 35, Wh n th valve pressure from the main valve chamber and 16has opened it can only be closed by openwaterline when the water valveopens. ing the cover 7 so as to release the latch 2 Another object is toshut off the air .supbolt 18.

ply from the casing in case the Water valve Th cover 6 is held in placeby bolts 30. is once opened in such a way that the all This cover 6carries air valve mechanism pressure cannot be again applied withoutwhich controls an alarm device 15. An air first inspecting the watervalve. valve member having a stem 27 is mounted 25 Another object is toautomatically give an in a chamber formed in the inner wall of the alarmwhen the water valve Opens and (liS- cover 6. Its valve 37 is normallyheld closed continue the air pressure from the Water line. by the camsurface oftoggle lever 9 which A further object of the invention is tois hinged to the lug 8 and opposes the spring provide a means forautomatically giylng t 32. The rod 11 which is mounted to slide 3o alarmwhich is positive in its 21 6 1 11 and in a guide way in the cover 6 issuspended by which will only permitof the alarm being the pin 10 justbeneath thehorizontal arm discontinued by the shutting off of the ail ofthe lever 9. The lower end of the rod supply from the compressor. 11 islocated just over one end of the rocker The body 1 of the casing has awater inlet lever or pa 112 hi h i i t d on th 1 35 2 at the bottom andan outlet 3 at the top. 31 alongside of the outer edge of the valve Airpressure is applied from any suitable 16, Th r k j t Over th d f sourceto the casing through the air inlet 4:. th valve so as to be actuated bythe valve Pipe 5 leads to an alarm operator 46. The i it openingmovement.

. sides of the casing have openings which are Th alve 38 on the upperend of the stem 99 normally closed by covers 6 and 7 1 27 is normallyopen but when the air prestively. The air valve seat 14 and water valvesure decreases so as to release the main valve seat 15 are in the sameplane and normally 16 th r k 12 i tilt d so a t lift th closed by themain valve 16 which is hinged r d 11 and thus move the lever 9. The at36. Gasket rings 23, 23 may be provid spring 32 then lifts the" stem 27and closes 45 as is customary. Such r gs m y be held the valve 38 to cutoff access of air pressure in place by rings 28 and scre S 1 y from pipe4 to the main chamber. The same A catch chamber 17 is located betweenmovement; Opens th valve 37 th t i seats 14 and 15 and provided with aconpressure from pipe 4 may pass through pipe nection 20 for the usualmain drain valve 5 to actuate alarm device 45 until the air 50 (notshown). The upper part of the casing pressure is shut off.

is provided with a connection 21 for the The alarm device (Fig. 3) has aplunger toward or away from each other.

.42 actuated by air pressure from the pipe 5.

This plunge-r has a rod as which carries a switch member adapted toengage contacts 39 in the circuit of an alarm hell or buzzer 4:0. Thecylinder 45 has an air inlet a? to permit the plunger 42 to move.

The test member shown in Fig. 2 has two end pieces 52 and 56 withsookets'threaded to receive the opposite ends of a rod having a righthand thread on the end and a left hand thread on the end 55. An angularenlargement or nut 54 is provided to afford a wrench hold for turningthe threaded rod and thus moving the end pieces 52 and 56 Soft-inbberwashers 50 and 58 are held on the opposite ends by screws 51 and 57 andw'ashers 49 and 59 respectively. The washers 50 and 58 are adapted tolit respectively in the seats 24; and 15 when the valve 16 is open.

ll hen the test valve device is adjusted in place the main valve body 1is completely shut off from both the upper and lower parts of the systemand we can test the various parts independently thus positively locatingleaks.

lVhen the parts are in the normal position of Fig. 1 it is assumed thatthe outlet 3 and the usual overhead system 0t pipes and sprinklers (notshown) are all under air pressure'which holds the valve it closed. Theopening of one or more sprinklers releases air from the system morerapidly than it is supplied through valve 38 so that the water pressurequickly overcomes the air pressure and opens the valve 16. 18 holdsthevalve open and prevents it from knocking on the water column.

As the valve 16 opens it throws rocker 12, lifts rod 11, and releasescam lever 9. Spring-32 then closes air valve 38 and opens air valve 37and diverts the air pressure from pipe 4 through pipe 5 to the alarmdevice 45. v

To reset the valve after it has been tripped, the water is shut offbelow the valve 16 by means of the usual gate valve or other acceptabletype of valve. The overhead system is then drained through the main outlet connection 20. The cover plate 7 is then unbolted and swung open onthe hinge 35 and the valve,16 swung out of the casing overon top of thecover 7. The test valve of Fig. 2 may beiiisert-ed and the system testedfor leaks.

hen everything is found all right the valve 16 is swung into place andthe rocker 12 and rod 11 set and the air valves 37 and 38 reset by meansof the cam lever 9. In the larger sizes the valve 16 may have an eye orrecess13 to provide a seat for a rope or tackle to lower the valve inplace.

The cover 7 is then closed and fastened in position and the air pressureapplied as before through pipe 4. When the air pres- T he latch 1. A drypipe valve comprising a casing having a water inlet at the'lo'ottoin anda water outlet at the top, a water valve hinged in the casing for saidinlet, said casing having openings on opposite sides, a cover plate forone or said side openings to permit access to said water valve, a coverplate for the opposite side opening, an air supply.

valve carried by said latter cover plate normally admitting air pressureon top of said water valve and means actuated by the opening of thewater valve to close said air supply valve. 7

A dry pipe valve comprising a casing having a water inlet and a wateroutlet, an air closed water valve for the inlet, means for admitting airpressure to said casing above said water valve, a compressed airoperated device connected to said casing above said water valve, valvemeans for shutting olt the air pressure from the casing and divertingthe air to the compressed air operated device, a cam for normallyholding said valve means in one position and means for moving said camactuated by said water valve.

3. A dry pipe valve comprising a casing having a water inlet and a wateroutlet, a water valve for said inlet, an air valve for supplyingairpressure on top of said water valve and means actuated by said watervalve toshut oil the air supply to the casing when the water valveopens.

4. A dry pipe valve comprising a casing having a water inlet, a wateroutlet and an air inlet, a water valve for normally closing the waterinlet, a normally open air valve adapted to close said air inlet, meanscontrolled by the opening movement of said water valve for closing saidair valve, an alarm device and means controlled by the movement of saidair valve for actuating .mally admitting air to said casing above saidcombined air and water valve, a cam lever 'normallyholding said springpressed valve open, means actuated by said combined air and water valvefor actuating said lever and permitting said spring pressed valve toclose when said air and water valve opens.

7. A dry pipe valve comprising a casing, a water valve therein, a valvefor admitting air under pressure to said casing to normally hold thewater valve closed, a cam for holding said air valve open,independently'of the water valve, means actuated by the water valve formoving said cam to release said air valve and means for closing the airvalve when released.

8. A dry pipe valve comprising a casing having a water valve and an airsupply valve and an air alarm valve and means of connection between saidvalves whereby said air alarm valve is opened when said water valveopens and air supply to said casing is shut off at the same time.

9. A dry pipe valve construction comprising a casing, a water valveoperable therein, an air supply valve for admitting air under pressureon top of said water valve, a cam and spring for controlling theposition of said air supply valve, a pawl operated by the opening ofsaid water valve and a connecting rod for transmitting motion from saidpawl to said cam to shut off air supply to said casing.

10. A dry pipe valve comprising a casing having a water inlet in itslower part and an outlet in the upper part, a water valve for the inlet,normally held closed by air pressure in the casing, an alarm valve, acam normally holding said alarm valve closed, means actuated by thewater valve for disengaging said cam from said alarm valve,

12. A dry pipe valve comprising a casing having a water inlet at thebottom and a water outlet at the top, a valve hinged in one side of saidcasing normally closing said water inlet, a latch bolt carried by oneside of the casing and adapted to coact with the hinged part of saidwater valve and a pawl .coacting with the opposite edge of said watervalve and a spring pressed supply valve a adapted to be released by saidpawl to shut oil the supply of air pressure to said casing when thewater valve trips the pawl.

13. A dry pipe'valve comprising a casing having a water inlet, a wateroutletand a side opening, a cover plate for said side opening having anair inlet and an air outlet, an air valve member carried by said platenormally closing the air outlet and leaving the air inlet open, apivoted main water valve for the water inlet normally held closed by airpressure within the casing, and means actuated by the opening of themain water valve for moving the air valve member to close the air inletand open the air outlet when the water valve opens. HARRY CAMPBELL.

